Attachment for road rollers



D. ERTER. ATTACHMENT FOR ROAD ROLLERS- v APPLICATION FILED OCR 2 I919-RENEWED MAY 31, 1921-, 1 ,404,38(),' Patented Jan.'24, 1922.

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attorney;

D. ERTER. ATTACHMENT FOR ROAD RQLLERS. APPLICATION FILED OCT. 2. 1919.RENEWED MAY 31.1921.

1,404,380, Patented Jan. 24,1922.

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UNITED STATES PATENT OFFICE.

DAVID ERTER, OF SPRING-FIELD, OHIO, ASSIGNOR OF 0NE-HALF TO BERT M.KENT, OF CLEVELAND, OHIO.

ATTACHMENT FOR ROAD ROLLERS.

Specification of Letters Patent.

Patented Jan. 24, 1922.

Application filed October 2, 1919, Serial No 327,838. Renewed May 31,1921. Serial No. 473,968

T 0 all whom it may concern:

Be it known that I, DAVID Enrnn, a citizen of the United States, andresiding at Springfield, Clark County, State of Ohio, have inventedcertain new and useful Improvements in Attachments for Road Rollers, ofwhich the following is a specification.

This invention relates to a device-which is designed to scarify orloosen up the surface of an old'roadbed preparatory to resurfacing it.In the form shown it con-' sists of an attachment adapted to be securedto. a road roller, and may be secured to the water tank as illustratedin Figure 1 of the drawings. The device embodies a row of scarifierteeth which may be reversed in position to act properly when the roadroller is moving forward, or when the road roller is moving backward,the row of teeth being inclined downwardly and forwardly for the forwardmovement, and downwardly and rearwardly for the backward movement. Thedevice furthermore includes simple, efficient, and easily operated meansfor adjusting the scarifier teeth and for yieldingly ressing them downso as to engage the roadbed. The novel features will be apparent fromthe following description taken in connection with the drawings. In thedraw- 1ngs Fig. 1 is a side view of the device secured to the rear endof a road roller;

In the drawings represents the rear end of a water, tank ofa road rollercarried by" the wheels 11, and my'invention is shown as secured to therear end of this tank. It will, of course, be understood that my devicemay be secured on any moving vehicle.

The device embodies a fixed frame 12 which may be secured by anysuitable means, 7

such as arms 13 and 14to the road roller or other vehicle, but ispreferably mounted at .-a slightangle to the verticahextending:rdownwardly and rearwardly from the top.

This frame 12 has the side bars 15 and '16 which are. channel shaped onthen faclng 'gle row of teeth in line, all

looking shaft or pin 41 s des so as to form trackways, as shownparticularly in Figure 4. A sliding frame 17 has side bars 18, 19 whichfit in and slide longitudinally in the grooves in the side bars 15 and16, and it will be understood that the bars 18 and 19 are not so long asthe grooves in which they fit. A steam cylinder 20' is secured in anysuitable way'to the cross bars 21 and 22 of the main fixed frame, as for1nstance, by the bolts 23. A piston works in the cylinder 20 and has theproectmg piston rod 24 which is connected at 1t s lower end to thesliding frame 17 by-the plvot pin 25 passing through the members 26, 27.The cylinder and piston may be operated by steam or compressed air, andthere is a four-way valve 28 above the cylinder for regulating andcontrolling the admission of the fluid under pressure to the ends of thecylinder to operate the piston, moving it up or down. Secured to andforming a part of the slidmg frame 17, there are side flanges 29, 30projectmg rearwardly from said frame at its sides near the bottom.Extending across the machine and mounted in bearingsin said side flanges29 and 30, there is a rotary shaft 31 which carries the scarifying teeth32. The shaft 31 is formed with depressions at intervals transverselythereof of the same shape as half section of one of the teeth, as shownat 33. A. removable plate 34 fits over the top on the other side, and issecured to the shaft 31 by bolts 35 which serve to clamp the teeth inplace, but permits removal when desired. In this device there is a sin arojecting from the. same side of the shaft. imiting rollers 37 aresecured on the ends of the shaft 31 to regulate the depth of thescarifying action.

The shaft 31 has secured to it arms 38, 39 on the inside and closelyadjacentto the flanges 29 and 30, and these arms are provided withopenings at their ends to receive a fastening pin. It will be understoodthat they move over the inner faces of the flanges 29 and 30 when theshaft 31 is turned, and the flanges '29 and 30 are provided withopenings 40 in an arc in line with the openings in the ends of the arms38 and 39. A passes through the openings to and the openings in the'endsof the arm 38 and locks the shaft 31 in any adjusted position. It will,of course be un-' derstood that any number of adjustments may beprovided which are deemed necessary, but in practice I prefer to operatethe teeth at an angle of about 80 to the vertical.

It is believed that the operation of the device will be apparent fromthe foregoing description. When it is desired to operate when themachine is moving forward, the

shaft 31 and teeth 32 are turned to an angle of about 30 to the verticalprojecting forwardly, and .when it is desired to operate when themachine is backing, as is often the case on hills, the shaft 31 and theteeth are turned to an angle of about 30 projecting rearward ly. Thechange in the adjustment is very slmple and easy, and it will beobserved'that the structure of the device is such that it will operateeasily and certainly in reciprocating the scarifier shaft and its teethwith less chance of getting out of order and with no chance of unduewear.v The fluid pressure operating mechanism, of course, furnishes ayielding pressure downward on the-scarifying teeth.

Having thus described the invention what I claim as new and desire tosecure by Letters Patent is:

'1. A reversible scarifier for road rollers when turned, means forsecuring said arms to said flangesin various ad usted positlons,

to .make said teeth project either forward or backward at an angle tooperate either on a forward movement or a rearward movement, and'meansforyieldingly passing said slidingv frame downwardly to make said teethengage the road bed. 7

5 2. scarifier for road rollers comprising a supportingframe adapted tobe secured to a road roller and having facing groovei lilre trackwaysfacing each other at the sides extending :downwardly and rearwardly atan angle, a sliding frame having side bear- 55.. ,fluid pressuremechanism secured to. said supporting frame at the central top portionmg portions. travelling in said trackways,

above said sliding frame and provided with apistonrod connected at itslower exposed end toj said sliding, frame to move it up and gilOWIl, leans' forcontrolling said fluid pressure mechan sm. to move said slidingframe up fand down, and a shaft carried bysaid fs liding frame at itsbottom provided with pro ecting scarifier teeth.

side

3. A reversible scarifier for road rollers comprising a supporting frameadapted to be secured to a road roller. and having facng groove-liketrackways facing each other at the sides extending downwardly and rearwardly at an angle, a sliding frame having ide bearing portionstravelling in said trackways, fluid pressure mechanism secured to saidsupporting frame at the central top portion above saidsliding frame andprovided with a piston rod connected at its lower exposed end to saidsliding frame to move it upand down, means for controlling said fluidpressure mechanism to move said sliding frame up and down, siderearwardly projecting flanges onsaid sliding frame at the bottom, ashaft mounted to turn in said flanges, a row of scarifier teethprojecting from said shaft, radiating arms secured to said shaft andmovable over the inner faces of said flanges and an adjusting rodadapted to pass through said flanges and said arms to secure said shaftin position with the teeth projecting forwardly at an angle orrearwardly at an angle.

4. A scarifier for road rollers comprising a supporting frame adaptedtobe secured to a road roller and havingparallel vertically extending.trackways thereon, a sliding frame having side bearing portionstraversing said trackways, scarifier teeth carried by said slidingframe, and cushioning means cooperating with said sliding frame andyieldingly resisting movements thereof from its working position. I j

V 5. A scarifler for road rollers comprising a supporting frame adaptedto be secured to a road roller and having parallel vertically extendingtrackways thereon a sliding frame having side bearing portions traversinsaid trackways, scarifier teeth carried by said sliding frame, fluidpressure means cooperating with said sliding frame and adapted toraise=-and lower the latter and'to yieldingly resist movements thereoffrom its working position, and means for controlling said fluid pressuremeans.

6. A scarifier for road rollersjcomprising a supporting frame adapted tobe secured to a road roller and'having parallel vertically extendingtrackways thereon, a sliding frame having side bearing portionstraversmg said trackways, scarifier, teeth carried by said slidingframe, means for adjusting.

the angular relation of said teeth to the ground so that the scarifleris operable on forward or rearward movement of the roller, andcushioning means cooperating with 'said'sliding frame and yieldinglyresisting movements thereof from its working position.

7. A. 'scarifijer-for road rollers 'comprisin a supporting frame adaptedto'be secure to a roadroller and'having parallel vertieally extendingtrackways thereon, a sliding frame having side bearing portionstraversing said trackways, soarifier teeth carried by said slidingframe, means for adjusting the angular relation of said teeth to theground so that the soarifier is operable on forward or rearward movementof the roller, fluid pressure means cooperating with said sliding frameand adapted to raise and lower the latter and to yieldingly resistmovements thereof from its working 10 position.

In testimony whereof I aflix my signature.

DAVID ERTER.

